Andy and Terry have a new book to write, but there's a problem. A BIG problem. Well, quite a few big problems actually.... On a hill not too far away there is a tree. And in that tree there is a tree house. And in that tree house there is a bowling alley, a see-through swimming pool, a tank full of sharks, a giant rope swing, a library full of comics, a secret underground laboratory, a vegetable vaporiser and a free marshmallow-dispensing machine.

The beloved World’s Worst series has captivated millions of readers. You’ve met the world’s worst children, the world’s worst parents, the world’s worst teachers and the world’s worst pets – but are you ready for the world’s worst monsters? If you don’t like ghosts, ogres, zombies, vampires, aliens, werewolves or mummies, DO NOT LISTEN TO THIS BOOK. Laugh along to these ten terrifying tales of marvellous monsters, brought to you by David Walliams.

Meet the Blunders: Bertie, Betsy, their children, Brutus and Bunny, along with their beloved grandma Old Lady Blunder, and their pet ostrich, Cedric. An ostrich is not a sensible pet, but then the Blunders are not sensible people. This family of upper-class twits live in a crumbling country house named Blunder Hall. When their home comes under threat, they must embark on a series of comic misadventures to save it.

From the world’s favourite author, David Walliams–ten cautionary tales and a delightfully dreadful cast of characters. Are you ready to meet the World’s Worst Children? Five beastly boys and five gruesome girls!

Sure, some parents are embarrassing - but they’re nothing on this lot. These 10 tales of the world’s most spectacularly silly mums and deliriously daft dads will leave you rocking with laughter. Pinch your nose for Peter Pong, the man with the stinkiest feet in the world...jump out of the way of Harriet Hurry, the fastest mum on two wheels...watch out for Monty Monopolize, the dad who takes all his kids' toys...and oh no, it’s Supermum! Brandishing a toilet brush, a mop and a very bad homemade outfit....

Joe has a lot of reasons to be happy. About a billion of them, in fact. You see, Joe's rich. Really, really rich. Joe's got his own bowling alley, his own cinema, even his own butler who is also an orangutan. He's the wealthiest 12-year-old in the land. But Joe isn't happy. Why not? Because he's got a billion pounds...and not a single friend. But then someone comes along, someone who likes Joe for Joe, not for his money. The problem is, Joe's about to learn that when money is involved, nothing is what it seems.

Millions of young listeners have loved the World's Worst Children tales. Now they will revel in this delightfully dreadful collection of the most gruesome grown-ups ever: The World's Worst Teachers. Think your teachers are bad? Wait till you meet this lot. These 10 tales of the world's most splendidly sinister teachers will have you running for the school gates. Dr Dread teaches science and is half man, half monster. Watch out for the ghastly Miss Seethe. She is always furious and she's on a detention rampage.

Alice-Miranda Highton-Smith-Kennigton-Jones can't wait to start boarding school. When she arrives at Winchesterfield-Downsfordvale Academy for Proper Young Ladies, the adventure begins...only not quite as Alice-Miranda expects. The minute she sets foot on the school's manicured grounds, she senses that something is wrong: Miss Grimm, the headmistress, is nowhere to be seen; the gardens have no flowers; and a mysterious stranger seems to be hiding out on the premises.

A story of prejudice and acceptance, funny lists and silly words, this new book has all the hallmarks of David’s previous best sellers. Our hero Ben is bored beyond belief after he is made to stay at his grandma’s house. She’s the boringest grandma ever: all she wants to do is to play Scrabble and eat cabbage soup. But there are two things Ben doesn’t know about his grandma.

 Fourth graders George Beard and Harold Hutchins are a couple of class clowns. The only thing they enjoy more than playing practical jokes is creating their own comic books. And together they’ve created the greatest superhero in the history of their elementary school: Captain Underpants! His true identity is SO secret, even HE doesn’t know who he is!